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  1. Article: Evaluation of the Influence of Frequency of Milk Collection and Milking Dayshift on the Microbiological Quality of Raw Milk

    Perez-Rodriguez, Fernando / Valero, Antonio

    Journal of food quality, 2018:1306107

    2018  

    Abstract: The aim of this study was to analyze the influence of milk collection frequency (24 h versus 48 h) and milking dayshift (morning and evening) on total mesophilic aerobic bacteria (MAB) and psychrotrophic bacteria (PSY) counts in raw milk samples. MAB ... ...

    Abstract The aim of this study was to analyze the influence of milk collection frequency (24 h versus 48 h) and milking dayshift (morning and evening) on total mesophilic aerobic bacteria (MAB) and psychrotrophic bacteria (PSY) counts in raw milk samples. MAB counts were determined by flow cytometry (BactoScan) and PSY counts by the plate counting agar method. An univariate statistical analysis was performed to find out significant differences among the studied factors. Results obtained showed that collecting milk every 24 h was effective in reducing MAB and PSY counts by 32 and 18%, respectively, compared to 48 h milk collection. This positive impact allowed reducing up to 4°C the temperature of the heat treatment in the dairy industry, thus involving energy savings of 22%. Milking during the mornings showed a significant reduction of MAB counts in comparison to milking performed during the evenings (P < 0.05). These results are highly useful for the improvement of milk quality through the optimization of collection and milking systems set at primary production.
    Language English
    Document type Article
    Database Repository for Life Sciences

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  2. Book ; Online: Descriptive Food Science

    Valero Díaz, Antonio / María García-Gimeno, Rosa

    2018  

    Keywords Agricultural engineering & machinery ; oxidative stress, antioxidant, antimicrobial, ultrasound, food safety, phenolic compounds
    Language English
    Size 1 electronic resource (182 pages)
    Publisher IntechOpen
    Document type Book ; Online
    Note English
    HBZ-ID HT030647396
    ISBN 9781838817251 ; 1838817255
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  3. Article ; Online: Optimal experimental design (OED) for the growth rate of microbial populations. Are they really more "optimal" than uniform designs?

    Guillén, Silvia / Possas, Aricia / Valero, Antonio / Garre, Alberto

    International journal of food microbiology

    2024  Volume 413, Page(s) 110604

    Abstract: Secondary growth models from predictive microbiology can describe how the growth rate of microbial populations varies with environmental conditions. Because these models are built based on time and resource consuming experiments, model-based Optimal ... ...

    Abstract Secondary growth models from predictive microbiology can describe how the growth rate of microbial populations varies with environmental conditions. Because these models are built based on time and resource consuming experiments, model-based Optimal Experimental Design (OED) can be of interest to reduce the experimental load. In this study, we identify optimal experimental designs for two common models (full Ratkowsky and Cardinal Parameters Model (CPM)) for a different number of experiments (10-30). Calculations are also done fixing one or more model parameters, observing that this decision strongly affects the layout of the OED. Using in silico experiments, we conclude that OEDs are more informative than conventional (equidistant) designs with the same number of experiments. However, OEDs cluster the experiments near the growth limits (X
    MeSH term(s) Models, Biological ; Research Design ; Kinetics ; Food Microbiology
    Language English
    Publishing date 2024-01-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 87122-9
    ISSN 1879-3460 ; 0168-1605
    ISSN (online) 1879-3460
    ISSN 0168-1605
    DOI 10.1016/j.ijfoodmicro.2024.110604
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4668: Show issues Location:
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  4. Article: Estimating Nonradiative Excited-State Lifetimes in Photoactive Semiconducting Nanostructures.

    Valero, Rosendo / Morales-García, Ángel / Illas, Francesc

    The journal of physical chemistry. C, Nanomaterials and interfaces

    2024  Volume 128, Issue 6, Page(s) 2713–2721

    Abstract: The time evolution of the exciton generated by light adsorption in a photocatalyst is an important feature that can be approached from full nonadiabatic molecular dynamics simulations. Here, a crucial parameter is the nonradiative recombination rate ... ...

    Abstract The time evolution of the exciton generated by light adsorption in a photocatalyst is an important feature that can be approached from full nonadiabatic molecular dynamics simulations. Here, a crucial parameter is the nonradiative recombination rate between the hole and the electron that form the exciton. In the present work, we explore the performance of a Fermi's golden rule-based approach on predicting the recombination rate in a set of photoactive titania nanostructures, relying solely on the coupling of the ground and first excited state. In this scheme the analysis of the first excited state is carried out by invoking Kasha's rule thus avoiding computationally expensive nonadiabatic molecular dynamics simulations and resulting in an affordable estimate of the recombination rate. Our results show that, compared to previous ones from nonadiabatic molecular dynamics simulations, semiquantitative recombination rates can be predicted for the smaller titania nanostructures, and qualitative values are obtained from the larger ones. The present scheme is expected to be useful in the field of computational heterogeneous photocatalysis whenever a complex and computationally expensive full nonadiabatic molecular dynamics cannot be carried out.
    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article
    ISSN 1932-7447
    ISSN 1932-7447
    DOI 10.1021/acs.jpcc.3c08053
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  5. Article ; Online: Thermodynamic Rarity Assessment of Mobile Phone PCBs: A Physical Criticality Indicator in Times of Shortage.

    Torrubia, Jorge / Valero, Antonio / Valero, Alicia

    Entropy (Basel, Switzerland)

    2022  Volume 24, Issue 1

    Abstract: Rising prices in energy, raw materials, and shortages of critical raw materials (CRMs) for renewable energies or electric vehicles are jeopardizing the transition to a low-carbon economy. Therefore, managing scarce resources must be a priority for ... ...

    Abstract Rising prices in energy, raw materials, and shortages of critical raw materials (CRMs) for renewable energies or electric vehicles are jeopardizing the transition to a low-carbon economy. Therefore, managing scarce resources must be a priority for governments. To that end, appropriate indicators that can identify the criticality of raw materials and products is key. Thermodynamic rarity (TR) is an exergy-based indicator that measures the scarcity of elements in the earth's crust and the energy intensity to extract and refine them. This paper uses TR to study 70 Mobile Phone (MP) Printed Circuit Boards (PCBs) samples. Results show that an average MP PCB has a TR of 88 MJ per unit, indicating their intensive use of valuable materials. Every year the embedded TR increases by 36,250 GWh worldwide -similar to the electricity consumed by Denmark in 2019- due to annual production of MP. Pd, Ta and Au embedded in MP PCBs worldwide between 2007 and 2021 contribute to 90% of the overall TR, which account for 75, 600 and 250 tones, respectively, and increasing by 11% annually. This, coupled with the short lifespan of MP, makes PCBs an important potential source of secondary resources.
    Language English
    Publishing date 2022-01-08
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e24010100
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Urban Flood Drifters (UFDs): Onset of movement.

    Valero, Daniel / Bayón, Arnau / Franca, Mário J

    The Science of the total environment

    2024  Volume 927, Page(s) 171568

    Abstract: Despite their catastrophic implications in flood events, the mobilization and transport of large, loose objects -termed Urban Flood Drifters (UFDs)- are often overlooked in flood management. These objects are inherent to anthropogenic activities, but are ...

    Abstract Despite their catastrophic implications in flood events, the mobilization and transport of large, loose objects -termed Urban Flood Drifters (UFDs)- are often overlooked in flood management. These objects are inherent to anthropogenic activities, but are not designed to remain stable under flooding conditions, nor are usually considered in flood risk studies. This oversight stems from our limited understanding of how flowing water interacts with these heterogeneous objects. To bridge this knowledge gap, we introduce a mechanistic stability model that predicts the onset of UFD mobilization across a diverse array of loose objects, from plastics to heavy vehicles. We further enhance the reliability of our model by incorporating a Monte Carlo-based probabilistic framework that accounts for uncertainties and interdependencies among the input parameters. Our results show that plastic and other litter are the most mobile objects found in urban setups, being subject to incipient transport under frequent floods. These are followed by wood (anthropogenic or natural) and urban furniture. Vans, caravans and recreational vehicles (RVs) can be more mobile than other light-weight vehicles in low-gradient areas, whereas trucks and buses remain considerably more stable; although more hazardous, when mobilized. Construction and metal debris are predominantly stable in low-slope areas. When integrated with flood maps or two-dimensional (2D) hydrodynamic models, our stability curves can guide urban planning efforts to predict and mitigate the impacts of UFDs during extreme flood events.
    Language English
    Publishing date 2024-03-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2024.171568
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
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  7. Article ; Online: Enriching electroactive microorganisms from ferruginous lake waters - Mind the sulfate reducers!

    Valero, Astolfo / Petrash, Daniel A / Kuchenbuch, Anne / Korth, Benjamin

    Bioelectrochemistry (Amsterdam, Netherlands)

    2024  Volume 157, Page(s) 108661

    Abstract: Electroactive microorganisms are pivotal players in mineral transformation within redox interfaces characterized by pronounced oxygen and dissolved metal gradients. Yet, their systematic cultivation from such environments remains elusive. Here, we ... ...

    Abstract Electroactive microorganisms are pivotal players in mineral transformation within redox interfaces characterized by pronounced oxygen and dissolved metal gradients. Yet, their systematic cultivation from such environments remains elusive. Here, we conducted an anodic enrichment using anoxic ferruginous waters from a post-mining lake as inoculum. Weak electrogenicity (j = ∼5 µA cm
    MeSH term(s) Lakes/microbiology ; Sulfates ; Iron/chemistry ; Minerals ; Oxidation-Reduction ; Bacteria
    Chemical Substances Sulfates ; Iron (E1UOL152H7) ; Minerals
    Language English
    Publishing date 2024-02-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2010650-6
    ISSN 1878-562X ; 0302-4598 ; 1567-5394
    ISSN (online) 1878-562X
    ISSN 0302-4598 ; 1567-5394
    DOI 10.1016/j.bioelechem.2024.108661
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1178: Show issues Location:
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  8. Article ; Online: Spatially and Temporally Distributed Complexity-A Refreshed Framework for the Study of GRN Evolution.

    Minelli, Alessandro / Valero-Gracia, Alberto

    Cells

    2022  Volume 11, Issue 11

    Abstract: Irrespective of the heuristic value of interpretations of developmental processes in terms of gene regulatory networks (GRNs), larger-angle views often suffer from: (i) an inadequate understanding of the relationship between genotype and phenotype; (ii) ... ...

    Abstract Irrespective of the heuristic value of interpretations of developmental processes in terms of gene regulatory networks (GRNs), larger-angle views often suffer from: (i) an inadequate understanding of the relationship between genotype and phenotype; (ii) a predominantly zoocentric vision; and (iii) overconfidence in a putatively hierarchical organization of animal body plans. Here, we constructively criticize these assumptions. First, developmental biology is pervaded by adultocentrism, but development is not necessarily egg to adult. Second, during development, many unicells undergo transcriptomic profile transitions that are comparable to those recorded in pluricellular organisms; thus, their study should not be neglected from the GRN perspective. Third, the putatively hierarchical nature of the animal body is mirrored in the GRN logic, but in relating genotype to phenotype, independent assessments of the dynamics of the regulatory machinery and the animal's architecture are required, better served by a combinatorial than by a hierarchical approach. The trade-offs between spatial and temporal aspects of regulation, as well as their evolutionary consequences, are also discussed. Multicellularity may derive from a unicell's sequential phenotypes turned into different but coexisting, spatially arranged cell types. In turn, polyphenism may have been a crucial mechanism involved in the origin of complex life cycles.
    MeSH term(s) Animals ; Gene Regulatory Networks ; Genotype ; Phenotype
    Language English
    Publishing date 2022-05-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells11111790
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  9. Article ; Online: Enveloped viruses show increased propensity to cross-species transmission and zoonosis.

    Valero-Rello, Ana / Sanjuán, Rafael

    Proceedings of the National Academy of Sciences of the United States of America

    2022  Volume 119, Issue 50, Page(s) e2215600119

    Abstract: The transmission of viruses between different host species is a major source of emerging diseases and is of particular concern in the case of zoonotic transmission from mammals to humans. Several zoonosis risk factors have been identified, but it is ... ...

    Abstract The transmission of viruses between different host species is a major source of emerging diseases and is of particular concern in the case of zoonotic transmission from mammals to humans. Several zoonosis risk factors have been identified, but it is currently unclear which viral traits primarily determine this process as previous work has focused on a few hundred viruses that are not representative of actual viral diversity. Here, we investigate fundamental virological traits that influence cross-species transmissibility and zoonotic propensity by interrogating a database of over 12,000 mammalian virus-host associations. Our analysis reveals that enveloped viruses tend to infect more host species and are more likely to be zoonotic than nonenveloped viruses, while other viral traits such as genome composition, structure, size, or the viral replication compartment play a less obvious role. This contrasts with the previous notion that viral envelopes did not significantly impact or even reduce zoonotic risk and should help better prioritize outbreak prevention efforts. We suggest several mechanisms by which viral envelopes could promote cross-species transmissibility, including structural flexibility of receptor-binding proteins and evasion of viral entry barriers.
    MeSH term(s) Humans ; Viruses
    Language English
    Publishing date 2022-12-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2215600119
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  10. Article ; Online: Exposure to Plasticiser DEHP Affects Eggs Spawned by Blue Mussels: A Possible Risk to Fertilisation?

    Mincarelli, Luana Fiorella / Turner, Alexander / Anderson, George / Wollenberg Valero, Katharina

    Toxics

    2024  Volume 12, Issue 3

    Abstract: The endocrine disruptive chemical DEHP is a plasticiser often found in marine waters. Here, we assessed the effect of this additive on the number and size of eggs spawned by female mussels during a synchronised spawning event. After achieving the ... ...

    Abstract The endocrine disruptive chemical DEHP is a plasticiser often found in marine waters. Here, we assessed the effect of this additive on the number and size of eggs spawned by female mussels during a synchronised spawning event. After achieving the ripeness of the gonads, mussels of both sexes were exposed to two environmentally relevant concentrations of DEHP (nominal concentrations 0.5 and 50 µg/L) for one week. A spawning event was then induced and eggs were collected, counted, and their size measured (area and diameter). A slight but not significant effect was observed in lowering the number of eggs spawned when increasing the DEHP concentration. This effect was greater when adding spent gonads (possibly fully spawned females) to the total number of females. A significant effect of the lower dose on the average egg sizes was noticed, with a smaller area and diameter measured with respect to the control and the higher concentrated treatments. These results once again underline the importance for ecotoxicological studies to address the nonlinear dose-response effects of endocrine disruptive chemicals environmentally present at concentrations in the order of just a few µg/L that could not elicit a strong defence mechanism at low levels and be absorbed by filter feeder animals such as mussels.
    Language English
    Publishing date 2024-02-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2733883-6
    ISSN 2305-6304 ; 2305-6304
    ISSN (online) 2305-6304
    ISSN 2305-6304
    DOI 10.3390/toxics12030172
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